Sixth congress on irrigation and drainage : transactions = Sixième congrès des irrigations et du drainage / International Commission on Irrigation and Drainage ; Vol. 1

International Congress on Irrigation and Drainage / International Commission on Irrigation and Drainage | TIBKAT | 1966

Sixth congress on irrigation and drainage : transactions = Sixième congrès des irrigations et du drainage / International Commission on Irrigation and Drainage ; Vol. 5: Question 22

International Congress on Irrigation and Drainage / International Commission on Irrigation and Drainage | TIBKAT | 1966

Sixth congress on irrigation and drainage : transactions = Sixième congrès des irrigations et du drainage / International Commission on Irrigation and Drainage ; Vol. 2: Question 19

International Congress on Irrigation and Drainage / International Commission on Irrigation and Drainage | TIBKAT | 1966

Sixth congress on irrigation and drainage : transactions = Sixième congrès des irrigations et du drainage / International Commission on Irrigation and Drainage ; Vol. 3: Question 20

International Congress on Irrigation and Drainage / International Commission on Irrigation and Drainage | TIBKAT | 1966

Sixth congress on irrigation and drainage : transactions = Sixième congrès des irrigations et du drainage / International Commission on Irrigation and Drainage ; Suppl.-Vol.: Post-congress written discussions : questions 19, 20, 21, & 22

International Congress on Irrigation and Drainage / International Commission on Irrigation and Drainage | TIBKAT | 1967